Electric transport properties and1H NMR study of the fullerene-Iike WS2 nanoparticles

Frieda Kopnov, Gregory Leitus, Alex Yoffe, Isai Feldman, A. M. Panich, Reshef Tenne

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Electrical resistivity and Hall measurements, of pellets compacted from IF-WS2 nanoparticles and 2H-WS2 powder were done. Electrical transport measurements were carried out on pellets by the van der Pauw method in a wide temperature range. Arrhenius plots for conductivities of the WS2 samples (2H, IF and IF+treatment) exhibit marked variations in (∂ ln ∂T-1)/∂T-1 with temperature. Resistivity of IF-WS2 pellets is higher than that of 2H-WS 2 pellets. It was found that the electrical properties of IF-WS 2 powder vary with aposteriory heat treatment under vacuum. The 1H NMR measurements show that the prepared product contains water (and possibly some hydrogen) molecules that occupy the voids in the central part of the fullerene-like nanoparticles and the nanopores between the adhering IF-WS2 particles. Defects in the IF-WS2 structure, arising due to the strain release during the folding of the layers, may result in additional sites for the absorbed water.

Original languageEnglish
Pages (from-to)3290-3296
Number of pages7
JournalPhysica Status Solidi (B): Basic Research
Volume243
Issue number13
DOIs
StatePublished - 1 Nov 2006

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